Double bolt, zinc plated, ductile iron hose clamps. Great for higher pressure hoses and connections.  Designed to be used with hose barbs with a raised bead. The inside edge of the clamp is concave to meet the raised part of the hose barb providing a secure connection.

Great for layflat discharge and mainline hoses!

For an overview of the different types of clamps available visit the following video:

Clamps Explained! 

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Brand Name:  Kuriyama